Table of contents: Fan switch ↓ Fan resistor ↓ Air conditioner switch ↓ Recirculation mode switch ↓ Thermal fuse ↓ Thermoregulator ↓ Air conditioner on relay ↓ High and low pressure sensor ↓
Fan switch
Check for continuity between the switch connector contacts in each position.
Fan resistor
Check the resistance between the connector contacts.
Air conditioner switch
In the ON position, the contacts must be closed.
Recirculation mode switch
In the ON position, contacts 1-3 and 4 3 must be closed, in the OFF position, they must be open.
Thermal fuse
The compressor should automatically switch off when its temperature rises to 145-155°C and switch on again when the temperature drops to 130-140°C.
Thermoregulator
Start the engine and turn on the air conditioner. Connect a voltmeter to the connector side and measure the voltage at the thermostat output.
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When the temperature at the evaporator outlet drops to 2.5-3.5°C, the thermostat should switch off (voltage about 12V), and when the temperature rises to 4.0-5.0°C, it switches on again (voltage is about 0 V).
Air conditioner on relay
Relay contacts (conclusions 3 and 5) must close when battery voltage is applied to terminals 1 and 2.
High and low pressure sensor
The sensor contacts should close when the pressure increases to 157-216 kPa (1.6-2.2 kgf/cm²) in the low pressure circuit and when the pressure drops to 1863-2256 kPa (19-23 kgf/cm²) in the high pressure circuit.
